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Commit 2d8ab6ad authored by Ananth N Mavinakayanahalli's avatar Ananth N Mavinakayanahalli Committed by Linus Torvalds
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[PATCH] ppc64: fix up()/down() usage for kprobe_mutex 



The incorrect kprobe_mutex usage on x86_64 had percolated to ppc64 too.
First noticed by Yanmin Zhang.

Signed-off-by: default avatarAnanth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 702c96d5

arch/ppc64/kernel/kprobes.c

+4 −4
Original line number Diff line number Diff line
@@ -59,9 +59,9 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) 


	/* insn must be on a special executable page on ppc64 */

	if (!ret) {

		up(&kprobe_mutex);

		p->ainsn.insn = get_insn_slot();

		down(&kprobe_mutex);

		p->ainsn.insn = get_insn_slot();

		up(&kprobe_mutex);

		if (!p->ainsn.insn)

			ret = -ENOMEM;

	}
@@ -90,9 +90,9 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p) 


void __kprobes arch_remove_kprobe(struct kprobe *p)

{

	up(&kprobe_mutex);

	free_insn_slot(p->ainsn.insn);

	down(&kprobe_mutex);

	free_insn_slot(p->ainsn.insn);

	up(&kprobe_mutex);

}



static inline void prepare_singlestep(struct kprobe *p, struct pt_regs *regs)